Erosion regimes

Table 9-2 Erosion regimes, features, and processes associated with transport-limited and weatherine-limited erosion...

In regions where the erosion regime is weathering limited, susceptibility of the bedrock to chemical and physical weathering controls erosion rates. This susceptibility relates directly to the chemical and physical properties of the rock. Susceptibility also depends on local climate. Moreover, weathering rates are affected by the... 

A low temperature imparts a metal erosion regime. With increase of temperature this metal erosion regime shifts to an oxide erosion regime via oxidation-affected erosion and oxidation-controlled erosion regimes. 

A higher feed rate extends the metal erosion regime and in turn alters the existence and extent of the other regimes. 

Oblique impact tends to reduce the extent of the metal erosion regime and promotes other regimes. 

Analysis of transition criteria for transition from metal erosion regime to oxide erosion regime... 

The presence of an oxide scale is responsible for the existence of a variety of material removal mechanisms during elevated temperature erosion of metallic materials. These mechanisms have been carefully verified by experimental work. Four distinct material removal mechanisms, namely metal erosion, oxidation-affected erosion, oxidation-controlled erosion and oxide erosion, have been experimentally established. These experimental observations have been substantiated by theoretical considerations. A suitable criterion for transition from one erosion regime to another regime is yet to evolve. Attempts have been made to analyse such transitions using preoxidized sanities. 

Consideration will now be given to the various flow regimes which may exist and how they may be represented on a Flow Pattern Map to the calculation and prediction of hold-up of the two phases during flow and to the calculation of pressure gradients for gas-liquid flow in pipes. In addition, when gas-liquid mixtures flow at high velocities serious erosion problems can arise and it is necessary for the designer to restrict flow velocities to avoid serious damage to equipment. 

Glaciers are powerful agents of physical erosion. In a detailed geomorphological study of the glaciated Canadian Shield, Sugden (1978) concluded that erosional style was related primarily to the basal thermal regime of the ice. From the center of divergence on an ice cap. 

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